Abstract: A drive mechanism for a household washer-dryer includes an at least approximately horizontally rotatably supported tub having a tub jacket and a tub axis. A gear pinion has a drive belt being wrapped around the tub jacket for driving the tub in opposite directions. A large pulley is connected to the gear pinion, is fixed against rotation relative to the gear pinion and is supported on a common axis with the gear pinion. An electric drive motor has a motor pinion with an axis. A gear belt is driven by the motor pinion for driving the large pulley. The common axis is movably guided axially parallel and is spring-loaded in a direction toward an increase in spacings between the common axis and the axis of the motor pinion as well as between the common axis and the tub axis.